From 5ee2bbc771d08dc452ba2e74abae335ec02b88d8 Mon Sep 17 00:00:00 2001
From: pogokeen <pogokeen@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Thu, 17 May 2018 22:33:13 +0000
Subject: [PATCH] polymost_drawpoly(): fix issue where mirrors wouldn't update
 the depth buffer

git-svn-id: https://svn.eduke32.com/eduke32@6888 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/build/src/polymost.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/source/build/src/polymost.cpp b/source/build/src/polymost.cpp
index 4b14ef047..34e4d0f84 100644
--- a/source/build/src/polymost.cpp
+++ b/source/build/src/polymost.cpp
@@ -3142,7 +3142,12 @@ static void polymost_drawpoly(vec2f_t const * const dpxy, int32_t const n, int32
             ; /* do nothing */
     }
 
-    if (!(method & DAMETH_MASKPROPS) && fullbright_pass < 2)
+    if (!waloff[globalpicnum])
+    {
+        glEnable(GL_BLEND);
+        glDisable(GL_ALPHA_TEST);
+    }
+    else if (!(method & DAMETH_MASKPROPS) && fullbright_pass < 2)
     {
         glDisable(GL_BLEND);
         glDisable(GL_ALPHA_TEST);